batgrbproduct Analysis for Trigger=287088

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Fri Dec 14 07:04:11 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger287088/GCN5_download_cron
======================================================================

  Trigger: 00287088      Segment: 000

  BAT Trigger Time: 208036547.584   [s; MET]
      Trigger Stop: 208036551.68   [s; MET]
               UTC: 2007-08-05T19:55:45.448360    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 245.043192352659   Dec: -59.9448796085781  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.19
     Image Trigger?:     NO
     Rate S/N Ratio:     11.3137084989848  [ if not an image trigger ]
     Image S/N Ratio:    9.19

  Flight Position:   [ source = BAT ]
    RA: 245.043192352659   Dec: -59.9448796085781  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 245.049690533308   Dec: -59.9599922352396  [deg; J2000]  
        { 16h 20m 11.9s , -59d 57' 36.0" }
         +/- 1.403727727923 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.522950157895985 [arcmin] (formal 1-sigma fit error)
    SNR: 18.7376131163551
    RA  =  16h 20m 11.9s  (245.049691 deg.)
    Dec = -59d 57' 36" (-59.959992 deg.)
 
  Angular difference between Flight and Ground position is 0.927536 arcmin
 
  Partial Coding Fraction: 0.609375    [ including projection effects ]

  Duration
     T90: 27.3640000224113 +/- 4.20024239442517
        Measured from: 0.680000007152557
                   to: 28.0440000295639     [s; relative to TRIGTIME]
     T50: 15.3760000169277 +/- 2.46085269498558
        Measured from: 6.08000001311302
                   to: 21.4560000300407     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 3.17200002074242     
                   to: 4.17200002074242     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.61599999666214     
                   to: 35.7000000178814     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.459971   0.412053   0.290759   0.135468
           0.037780   0.038017   0.033820   0.029231 [error]
 Peak      0.021355   0.025297   0.023735   0.011778
           0.006358   0.006522   0.005937   0.004884 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
=== Fluence/Peak Flux Summary ===
 
              Model    Band1    Band2    Band3    Band4    Band5    Total      
                       15-25    25-50   50-100  100-350   15-150   15-350   keV
Fluence   Power-law 1.38e-07 2.06e-07 2.29e-07 4.82e-07 7.18e-07 1.06e-06   erg/cm2
              Error 2.29e-08 1.98e-08 3.62e-08 1.65e-07 8.03e-08 1.94e-07   erg/cm2
Peak flux Power-law 1.82e-01 2.07e-01 1.69e-01 2.30e-01 6.42e-01 7.89e-01   ph/cm2/s
              Error 8.97e-02 6.16e-02 4.75e-02 1.45e-01 1.66e-01 1.95e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.38e-07 2.06e-07 2.29e-07 4.78e-07 7.18e-07 1.05e-06   erg/cm2
              Error 2.29e-08 1.98e-08 3.63e-08 1.64e-07 8.03e-08 1.93e-07   erg/cm2
Peak flux Cutoff-PL 1.82e-01 2.07e-01 1.69e-01 2.29e-01 6.42e-01 7.87e-01   ph/cm2/s
              Error 8.97e-02 6.17e-02 4.75e-02 1.44e-01 1.66e-01 1.95e-01   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 1.66e-01 2.04e-01 1.71e-01 2.39e-01 6.39e-01 8.05e-01   ph/cm2/s
              Error 4.25e-02 5.66e-02 4.25e-02 6.55e-02 2.29e-01 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.845    0.203    -      -           2.15e-03 2.38e-04   80.159 57
CPL   1.844    0.204    9967.0 5000.0      2.15e-03 2.39e-04   80.169 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.294    0.462    -      -           5.39e-03 1.31e-03   41.499 57
CPL   1.290    0.465    9998.8 5000.0      5.41e-03 1.31e-03   41.505 56
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err   : 90% error of the photon index
Epeak      : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm       : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom
 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 30.016000 sec.
T50 in the 50-300 keV band: 15.296000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   36.316   -0.616   35.700
T90    27.364    0.680   28.044
T50    15.376    6.080   21.456
Peak    1.000    3.172    4.172

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  245.0497 -59.9600 0.0102   35.7  -32.5       1.3783    18.7  TRIG_00287088       
------------------------------------------
 
Foreground time interval of the image:
 -0.616  35.700 (delta_t =  36.316 [sec])
Background time interval of the image:
-239.584  -0.616 (delta_t = 238.968 [sec])

Lightcurves

Notes:

1 s binning

From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval

64 ms binning

Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec

16 ms binning

From T100_start-5 s to T100_start+5 s

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Spectra

Notes:

Time averaged spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -0.616 sec. to   35.700 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.84450     ( -0.199567   0.206965 )
Norm@50keV  : 2.150581E-03    ( -2.412042E-04   2.338942E-04) )
------------------------------------------------------------
 Chi-Squared =      80.15868     using    59 PHA bins.
 Reduced chi-squared =      1.406293     for     57 degrees of freedom
 Null hypothesis probability = 2.327E-02
 
Photon flux (15-150 keV)    in 36.32 sec: 0.301615 ( -0.029802  0.029908 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.18155e-07 ( -7.9726e-08  8.08737e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.616 sec. to   35.700 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.84401     ( -0.200018   0.208212 )
Epeak [keV] : 9967.00      ( -9966.99 32.9961 )
Norm@50keV  : 2.154349E-03    ( -2.448329E-04   2.333692E-04) )
------------------------------------------------------------
 Chi-Squared =      80.16883     using    59 PHA bins.
 Reduced chi-squared =      1.431586     for     56 degrees of freedom
 Null hypothesis probability = 1.875E-02
 
Photon flux (15-150 keV)    in 36.32 sec: 0.301474 ( -0.02979  0.029897 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.18141e-07 ( -7.98132e-08  8.08302e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.616 sec. to   35.700 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.46169   ( -7.89831   7.10169 )
beta        : -1.79644    ( -0.207076   0.199078 )
Epeak [keV] : 9.70575      ( -9.60575 9990.29 )
Norm@50keV   : 6.186166E-03    ( -3.280199E-02   3.177693E-02) )
------------------------------------------------------------
 Chi-Squared =      80.31399     using    59 PHA bins.
 Reduced chi-squared =      1.460254     for     55 degrees of freedom
 Null hypothesis probability = 1.461E-02
 
Photon flux (15-150 keV)    in 36.32 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    3.172 sec. to    4.172 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29372     ( -0.475818   0.448814 )
Norm@50keV  : 5.391069E-03    ( -1.309431E-03   1.307954E-03) )
------------------------------------------------------------
 Chi-Squared =      41.49923     using    59 PHA bins.
 Reduced chi-squared =     0.7280567     for     57 degrees of freedom
 Null hypothesis probability = 0.939
 
Photon flux (15-150 keV)    in 1.000 sec: 0.642428 ( -0.165801  0.166599 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.336e-08 ( -1.39438e-08  1.40564e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    3.172 sec. to    4.172 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28986     ( -0.478946   0.451788 )
Epeak [keV] : 9998.76      ( -9998.75 1.24121 )
Norm@50keV  : 5.414228E-03    ( -1.314075E-03   1.313216E-03) )
------------------------------------------------------------
 Chi-Squared =      41.50494     using    59 PHA bins.
 Reduced chi-squared =     0.7411596     for     56 degrees of freedom
 Null hypothesis probability = 0.926
 
Photon flux (15-150 keV)    in 1.000 sec: 0.642231 ( -0.165753  0.166553 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.33833e-08 ( -1.39632e-08  1.40289e-08 ) ergs/cm2
 
Band function
Time interval is from    3.172 sec. to    4.172 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.04789   ( -8.95211   6.04789 )
beta        : -1.28676    ( -8.71324   0.469081 )
Epeak [keV] : 37.3592      ( -37.2592 9962.64 )
Norm@50keV   : 1.028551E-02    ( -1.028551E-02   0.944813 )
------------------------------------------------------------
 Chi-Squared =      41.50242     using    59 PHA bins.
 Reduced chi-squared =     0.7545895     for     55 degrees of freedom
 Null hypothesis probability = 0.911
 
Photon flux (15-150 keV)    in 1.000 sec: 0.638885 ( -0.30294  0.154956 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.33352e-08 ( -1.3944e-08  1.40077e-08 ) ergs/cm2
 
Plot creation:
Fri Dec 14 07:19:06 EST 2007